63 citations · 208 across the 7 of their papers we have counts for
7 papers
Single-shot online sequence classification with unbounded quantum memory advantage
Keith K. Ng, Haochen Jay Li, Mile Gu +1
An agent monitors a complex environment, receiving one observation at each time step and eventually deciding how to label the resulting sequence. Does the sequence indicate an anom…
A Little Excitement Across the Horizon
Keith K. Ng, Chen Zhang, Jorma Louko +1
We analyse numerically the transitions in an Unruh-DeWitt detector, coupled linearly to a massless scalar field, in radial infall in (3+1)-dimensional Schwarzschild spacetime. In t…
Unruh-DeWitt detectors and entanglement: the anti-de Sitter space
Keith K. Ng, Robert B. Mann, Eduardo Martin-Martinez
We investigate entanglement harvesting in AdS. Applying the general results of [Phys. Rev. D 97, 125011 (2018)], we consider two scenarios: one where two particle detectors are…
New techniques for entanglement harvesting in flat and curved spacetimes
Keith K. Ng, Robert B. Mann, Eduardo Martin-Martinez
We present a new technique for computing entanglement harvesting with Unruh-DeWitt particle detectors. The method is particularly useful in cases where analytic solutions are rare…
Over the horizon: distinguishing the Schwarzschild spacetime and the spacetime using an Unruh-DeWitt detector
Keith K. Ng, Robert B. Mann, Eduardo Martin-Martinez
We show that a particle detector can distinguish the geon from the Schwarzschild black hole, even though they differ only by a topological identification beyond the…
The equivalence principle and QFT: Can a particle detector tell if we live inside a hollow shell?
Keith K. Ng, Robert B. Mann, Eduardo Martin-Martinez
We show that a particle detector can distinguish the interior of a hollow shell from flat space for switching times much shorter than the light-crossing time of the shell, even tho…